Men have to ejaculate several times a year, best way is inside a womans belly. For married men this is no problem, they can do it when its needed. For single men its a problem, if they can not unload inside a woman they get very frustrated.
That is why married men have to lend their woman, young mothers, pregnant, or daughters to single men in order to unload inside them. Special night are held in swingerclubs or at home. Men bring a few times a year their woman, and single men come to pump them. Woman that don't want to, or when the men are extreme wellhung, or agresive fuckers, women have to be tied up.
Several men will enter your wife and cum inside her belly until pressure is gone.
After pissing the women clean she can go home with her husband.
She know it her turn again in a few months."